Lock and latch



Aprilv 19,' 1927.v

1,625,595 O. A. EASTLACK LOCK AND LATCH 2 Sheets-Sheet 1 Filed' Nv. 2a.1921 April 19, 1927.

O. A. EASTLACK LOCK AND LATCH l I 2 Sheets-Sheet 2 Filed Nev. 2a 192;

Patented Apk-19,1927. c

NETE@ STTES P'FET FQ.

OSCAR A. EASTLACK, OF CAMDEN, NEW JERSEY.

LOCK AN'D LATCH.

Application led November 28, 1921. Serial No.. 518,192.

My invention relates to improvements inl aperture in the guide plate 13,is a trip Or locks and latches, the object of the invention release pin16, said pin having secured to the being lto provide improved means forpreinner end thereof a substantially U-shaped venting the picking of thelock as by means cross head 17. The outer ends 1S, 18, of this 60 5of'forcing back the bolt with a sharp instrucross head are turnedlaterally away from ment inserted between the lock and the each otherand are widened so as to permit keeper plate. i of engagement by therespective arms of the rPhe invention will be more readily vundertworetracting elements 5 and 7 as best stood by reference to the attacheddrawings, shown in Figs. 1, 2 and 3. 65 1o in which: Secured to the pin16 is a cross head 2G,

Figure 1 is a rear face view of a lock made said cross head extendingupwardly` between in accordance with my invention, having the theextensions 9 and 10 of the bolt and havcover plate removed; inglaterally extending arms 21, 21, estab- Fig. 2 is a section on the line2-2, Fig. 1; lished in the recess 11 in the said bolt. 70 Fig. 3 is aview similar to that of Fig. 1, Mounted on thev pin 1G and confinedbetween but illustrating the bolt in the retracted pothe guide plate 13andthe inner face of the sition, and. i cross head 20 is a spring 22,while each of Figs.' 4 to `10, both inclusive, are detached-the guidepins 12 also carries a spring 23 perspectives of elements of the lockmechawhich are confined between the guide p late nism. 13 and the rearfaces of the extensions) In the draw-ings, 1 indicates the lock casand10. The springs 22 and 23 tend to re-v ing comprising a substantiallyrectangular tain both the bolt and the pin 16 in the adtrough-shapedportion 2, said casing having vanced position in which they areillustrated detachably secured thereto in suitable manin Figs. 1 and 2.It will be apparent that 80 5 ner a cover plate 3 for the open side ofthe the pin 16 is permitted a movement indecasing. Mounted in one end ofthe casing is pendent ofthe bolt 8 to the extent of the a knob 4 havingattached thereto on the indifference in width between the slot 11 andside of the casing, asbest shown in Fig. 1,'a the arms 21 of the crosshead 20, and further substantially T-shaped element 5, by means thatwhen either of the retracting elements 555 of which the bolt isretractedwhen the knob 5 or 7 is moved to retract the bolt, thereis'turned in a manner to be described hereresults first a movement tothe full vextent inafter. In alignment with the knob 4 and of the pin 16independent of the bolt or tixed in the cover plate 3 is a key-operateduntil the rear faces of the arms 21, 21, enshaft .6, to the inner end ofwhich a second gage the rear face of the slot 11, after which nosubstantially T-shaped element 7 is secured, the bolt 8 is withdrawnwith the pin 16 to said element being adapted in the same manthe finalposition illustrated in Fig. 3. The ner as the element 5for retractingthe bolt. inward movement ofthe bolt is limited by Slidably mounted inthe front of the casa pair of lugs 3*l on the cover plate 3, said ing 1and adapted to extend through a suitlugs being located respectively inthe paths o5 4o able opening in the front side thereof is a vof theprojections 9 and 10.

bolt 8, said bolt having a pair of rearward In the retracted position ofthe bolt 8, a extensions 9 and 10, as most clearly shown in detent 25slidably mounted in the base of the Fig. A4, and said extensionsbeing'so shaped casing is adapted to releasably retain the as to providea lateral slot or recess 11. Pro. bolt, said detent having a forwardlyextendion `jecting rearwardly from the ends' of each of ing hook-likemember 26, which latter is the 'projections 9 and 10 is a tail-piece oradapted to engage the forward end of the y guide pin 12, 12, whichlatter pass through extension 9 of the bolt, as illustrated in Fig.suitable apertures in a guide plate 13 mount: 3. Apm 27 extends througha slot in the ed on and extending between a' pair of base of the 'casing1, and is secured to the 105 bracket lugs 14, 14, which extend inwardlydetent 25 in. the manner shown in Fig. 2, from the base of the casing 1,the guide pins said pin having a shoulder bearing against being free toslide through said apertures. the outer surface of the casing, therebyboth Extending .through a central aperture or retaining the detent inproper position bepassage 15 in the bolt 8 and extending rear` tweensets of guide lugs 28, 28, on the inside 11o 55. wardly intermediate thesaid extensions., 9 of the casing and provldlng means for shiftand 10 ofsaid bolt and through a suitable ling the detent to' either engage orrelease the bolt, as .the case may be, from the outside vrear of the pin31 'and the inner end of the recess in the lug 32 occupied by the pin, aspring 33 tending to force the pin forwardly against the rear notchededge of the latch 25,- said pin and spring functioning to retain thelatch in either the bolt-retaining or boltreleasing position, as thecase may be.

Extending inwardly from each side of the casing 1 and mounted insuitable guide brackets35, 35, is a locking pin 36, said pins beingslidably mounted in suitable slots 37 in said brackets, and 'beingretained in the slots by the cover plate 3, as best shown in Fig. 2.Each of the locking pins is recessed i at the rear and has establishedin` said recess a pin 38, between the inner end of which and the bottomof the recess is confined a Spring 39, which latter tends, by lforcingthe pins 38 against the sides of the casing. to-

advance the locking pins inwardly in their slots, the inward movement ofthe locking pins being limited by shoulders 40 at the rear thereof whichengage the sides of the brackets 35, as shown in Fig. l. In thisi'igure, the locking pins are illustrated in the normal advancedposition, in which position the forward edges lie in basl; of the innerends of the extensions 9 and 10 of the bolt 8, thereby preventingretraction of the bolt. Means, however, is provided comprising a camplate .41 secured to the top of the cross head 2O for forcing the pinsoutwardly to release thel bolt upon retraction of the pin 16, the camelement 41 having rearwardly extending arms 42, 42, the bev- 'eledrearward end edge of which is adaptedv to engage similarly beveledportions 43 of the forward edges of the locking pins 36, the interactionof these engaging beveledportions effecting an outward movement. whenthe pin 16 is retracted, ot' the said locking pins 36, and a conse uentrelease by said locking pins of the bo t 8.

Itwill be noted that the independent movement of the cross head 2O andthe pin A 16 inde ndent of the bolt is suiiicient to accomplis theretraction of the locking pins 36 to a sufficient extent to release .thebolt 8, which'thereafter is permitted to move rearwardly with the pin16. It will be noted also that the front corners of the cam mem.- ber 41are beveled, as indicated at 45, 45, and

that the locking pins 36 also have a portion 46 of their rear inneredges beveled to cor respond with the bevel 45, these bevels -insuringunder all conditions a withdrawal of the locking pins to. permit theadvance ofthe bolt into the operative position fromthe retractedposition. 'In conjunction with the elements of' the lock so fardescribed, there is providedl a keeper plate 48 for the bolt 8, saidplate including an extension 49 from-one side' .hav-

Iing a beveled or inclined-face 50. The cas` ing 1 may be attached tothe door in the usual manner, and the keeper plate to thel door jamb ina position to receive the bolt 8 when the door is closed. In closing thedoor, the beveled face 50 of the keeper -plate is engaged first -by thebeveled forward end of the pin 16, which extends beyond thecorrespondingly forward beveled face of the latch 8, the pin 16accordingly being forced into the casing toa suiiicient extent toretract the retaining pins 36, and to thereby release the bolt 8. W'hen,therefore, the bev-` eled face of the bolt engages the inclined face 50,the bolt is free to move into the casing 1, whiclnit accordingly does,both the bolt and the pin 16 being forced out of the casing 1 and intothe interior of the keeper Aplate 48 afterthedoor is closed by means ot'the springs 22 and 23.' 'In this position, it is manifestlyimpossible toagain retract the bolt 8 until the pin 16 is iii-st retracted,- andsince retraction of vthis pin can be accomplished only by means of theknob 4 or by a key through the sleeve 6. all danger of the lock beingpicked is eliminated.

It will be noted that the locking device .V

hereinbefore described is of an extremely simple and etcient nature, and1n no Way interferes with the normal operation of the further be notedthat the bolt 8 is symmetrical about a horizontal plane (reference be.-ing had to Fig. 2) passing through the center of the pin 16, thuspermitting inversion of the bolt without effecting the operation of thelock. in this manner, the lock may be adapted for use on doors whichopen outwardly as well as inwardly. Y

Although the particular lockillustrated and described is what istermed arim look, this particular type of lock was selected entirely vfor thepurpose of illust-ration, and it is obvious thatmy invention is notlimited thereto.

I claim:

1. The combination with a casing'of a bolt slidable therein and adaptedin an advanced position to project Vbeyond the side of said casing, a.single retracting element slidable within said bolt in a directionco4incident with the movement of said bolt and normallyprojecting beyondthe fface yof saidbolt, means for limiting the relative movement betweenthe retracting element and the bolt, and means engaging said retractingelement for effecting initial relative vmovement betweenl the retractingelement and the bolt and subsequent conbolt when the dooris thrown to.It should position within the casing, and movablemeans projecting intothe path of and normally preventing retraction of the bolt and adaptedto be shifted out of the path of the boltby said relatively movableelement.I 3. The combination With a casing, of a' bolt slidable in saidcasing and adapted inl an advanced position to project beyond-the side,of the casing, "means Within the 'casing tending to prevent theretraction of the bolt from the advanced position, an element" movablewith respect to and .slidable in a direction parallelmg the path of thebolt.

vand adapted to release the bolt from the said retraction-preventingmeans,.means on the bolt limiting the movement of said element relativethereto, and bolt retracting means connected With said element.

' 4. The combination with a casing, of abolt slidable therein andadapt/d in an advanced position to project beyond' the side of thecasing, a 'lateral recess in said bolt, a member mounted in Said recessandhavthe bolt, bolt retracting .means connected to said element, andelements adapted to project into the path of said boltvto preventretraction and to be shifted out of the path of said bolt byjmovementofy the said s member.

5. The combination with a casing, of a bolt slidably mounted therein andadapted in an advanced position to project beyond the side thereof, aspring-pressed dog movably mounted in the casing and adapted normally toproject into the path of the -ter is retracted', and retractingmechanism v mg therein a limited movement relative to' bolt to preventretraction from the advanced position, and means operatively associatedWith the'bolt and having a limited movement relative thereto forshifting said retaining element from the path of the bolt to permitretraction of the latter into' the casing. j

6. The combination with a casing, of a bolt slidably mounted =in saidcasing and adapted in an advanced position'to project beyond the sidethereof, a spring-pressed element adapted normally to project linto thepath of said bolt to prevent retraction of the latter 4from the advancedposition, a member operatively associated with and -having a limitedmovement relative to the bolt and having an4 inclined cam surface 65adapted to engage the bolt-retaining ele A' ment to shift it by movementofthe mem` ber from the path of the bolt when the latconnected With saidmember. 70 7. The combination With` a casing, of a bolt slidably mountedinthe casing and adapted in an advanced position toproject beyond theside thereof, an element extending through said bolt and normally beyond75 the outerv face thereof and being capable of limited movementrelative to the bolt, retracting mechanism connected with said element,means for releasably retaining the bolt in the advanced position, andmeans carried by 'said element for releasing the bolt from saidretaining means to permit retraction into the casing. t ,Y

- 8. The combination with a casing, of a bolt slidably mounted in thecasing and adapted in an advanced position to project beyond the sidethereof, anelement extendin through said bolt and normally beond t 1eouter face thereof and being capale of limited movement relative tothe9o bolt,- the center line of said element lying in a plane bisectin thebolt whereby reversal of the bolt in t e casing is permited, andretracting mechanism connected with said element.

OSCAR A. EASTLACK.

